Notional results for a UK general election on 12 December 2019 Elections won by Sinn Féin

A notional general election to the 58th Parliament of the United Kingdom with an electorate of 47,558,398, having 32,014,119 valid votes.

Constituency Electorate Turnout Votes Vote share Majority
Belfast North 71,372 67.4% 23,158 48.1% 3,739
Belfast West 71,921 59.6% 20,786 48.5% 12,997
Fermanagh and South Tyrone 74,643 69.2% 21,968 42.5% 510
Mid Ulster 70,094 63.5% 20,372 45.7% 9,806
Newry and Armagh 74,585 62.4% 19,088 41.0% 9,673
South Down 71,772 62.7% 13,863 30.8% 1,623
West Tyrone 70,614 62.2% 17,604 40.1% 8,074

Turnout as calculated by the House of Commons Library, is the total number of votes cast and not spoiled, divided by the size of the electorate.

Estimates of the 2019 general election result in new constituencies

BBC News, ITV News, Sky News and the Press Association have together produced estimates of the 2019 general election result as if the new constituencies recommended by the separate Parliamentary Boundary Commissions for England, Scotland, Wales and Northern Ireland had then been in existence.

Rallings & Thrasher, Professor David Denver (Scotland), Nicholas Whyte (NI) for Sky News, PA, BBC News and ITV News.

An explanation of the methods used and the electoral impact of the changes can be found in the linked document.